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【单选题】
（2009·杭州中考）下列说法中正确的是( )A.
只要物体振动，就一定能听到声音
B.
固体、液体、气体都能传播声音
C.
宇航员们在月球上也可以直接用口语交谈
D.
声音在固体、液体中比在空气中传播得慢些
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A.
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B.
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C.
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D.
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